Indicator device for machines for measuring areas of surfaces.



No 781,900. PATENTED FEB. '7, 1905. J. B. NIGHTINGALB.

INDICATOR DEVICE FOR MACHINES FOR MEASURING AREAS OF SURFACES APPLICATION FILED JUNE 11, 1904.

fl 7 M.

UNITED STATES Patented February '7, 1.905.

PATENT EEioE.

INDICATOR DEVICE FOR MACHINES FOR MEASURING AREAS OF SURFACES.

SPECIFICATION o g part of Letters Patent o. 781,900, dated February '7, 1905.

Application filed June 11, 1904. Serial No. 212,113.

To ml]. M lt/mt it may concern:

Be it known that I, Josmn E. NIGII'IINGALE, a citizen of the United States, and a resident of Danvers, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Indicator Devices for Machines for Measuring Areas of Surfaces, of which the following is a specification.

This invention relates to improvements in indicator devices for machines for measuring the areas of surfaces of the kind shown and described in the patent granted to me September -1-, 1900, No. 6573 14.

The invention carried out as follows. reference being had to the accompanying drawing, which represents a front view of the improved indicator device.

In my former patent above mentioned the graduated dial Q and its index-pointer were located at one side of the middle portion of the machine, which is objectionable, as it prevents the operator standing in front of the middle partof the machine to accurately ascertain the reading of the dial on account of its pointer being arranged a little distance in front of said dial, similar to the hand of a clock-face. In my present invention I have so arranged the lever-connecting mechanism of the indicator device as to enable me to.

place the graduated dial directly at the middle portion of the machine, by which the reading of the dial by the operator directly facing it is accurately accomplished without error caused by looking at the dial in an oblique direction.

In the drawing, A A represent the upright end frames, to which is connected the crossbar B, which serves as a support for the dial and indicating devices, as shown in my abovementioned patent.

(,2 is the graduated dial, secured to the crossbeam B, and q is the index, secured to the shaft of the pinion 1 the teeth of which mesh in the teeth of the segment 1 on one end of the beam which is pivotedat 1 and provided with a balance-weight g", as is common in devices of this kind.

(1" is a link connected to the beam q, as usual.

In connection with said beam and dial 1 use a system of levers as follows: To the frame B I pivot at z a lever T, which is preferably pivoted axially below the dial to a link i, as shown. The free end of said lever T is connected by means of the link 1 as shown. The lower end of the link 2." is pivotally connected to the lever R, the longer end of which is pivotally connected by a link to a lever R. The shorter end of the lever R is pivotally connected by a link to a lever l t, and to the shorter end of the latter is pivotally connected a lever R" similar to the one marked R on the longer end of the lever It. The ends of the lovers R R, as well as the longer end of the lever R, are pivotally connected by links to levers R. The shorter ends of the levers R are pivotally connected to levers R", from the ends of which are suspended the pulleys 1'. Similar pulleys are also suspemled from the longer ends of the levers R, as shown. ()ver each pulley is carried a chain S, the lower ends of which are suitably connected to the usual segmental gears used in measnring-machines of this kind and fully shown and described in my above-mentioned patent.

It will be noticed that the arrangement of the levers R, R, R, R", R, and R is the same as in my patent mentioned, but by such arrangement I am obliged to locate the dial Q, to one side of the machine, which, as hereinbefore stated, is objectionable. By the addition of an upper lever T suspended from the beam (1 and pivotally connected to the lever 1t, .1 am enabled to locate the dial Q midway between the end frames A A, as shown in the drawing, in which X represents the middle line of the machine.

\Vhat I wish to secure by Letters Patent and claim is In a machine for measuring the areas of surfaces, a system of levers, composed of an upper lever T suspended from the beam 1 and pivotally connected in one end to the frame of the machine, a lever lt, having a long and short arm pivotally connected to the free end of lever T, a lever B pivotally connected to the larger arm of lever R, a lever R", having a long and short arm, pivotally connected to the short arm of lever R, a lever R pivotally connected to the short arm of the lever R, a series of levers R havin each a of the se -mental ears of a measurin ma IO 2:! I b l b a: long and short arm plvotally connected to chlne as and for the purpose set forth.

opposite ends of the levers R R, and to the In testimony whereof Ihave affixed my siglonger arm of lever R, a series of levers R nature in presence of two Witnesses.

5 pivotally connected to the shorter arms of the 1 levers R, and a series of pulleys r, 0* suspendi JObIAH NIGHTINGALE' ed from the ends of the levers R and th Vitnesses: longer arms of the levers 3*, and chains or ALBAN ANDREN,

cords S leading from said pulleys to'the hubs HELEN F. ANDREN. 

